VMS Help CMS, CANCEL, REVIEW, Qualifiers, /GENERATION[=generation-expression]  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies which generation of the element is to have its review
    pending status canceled. If you omit /GENERATION, CMS cancels
    the review of the most recently created generation with a
    review pending. You specify this qualifier only if more than one
    generation of an element is under review.